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Changes In The Vulvular And Vestibular Tissue Of The Bovine During The Estrous Cycle As Determined By The Use Of Near Infrared Interactance, Robert Alan Kunzler
Changes In The Vulvular And Vestibular Tissue Of The Bovine During The Estrous Cycle As Determined By The Use Of Near Infrared Interactance, Robert Alan Kunzler
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Near infrared reflectance spectroscopy is routinely used for the analysis of quality components of feedstuffs. Near infrared spectrophotometers, coupled with a fiber optic probe, could enable direct measurements of the live animal. This study was conducted to characterize changes in the vulva and vestibule during the bovine estrous cycle using near infrared (NI) spectroscopy. Sixteen cycling Holstein cows were observed for estrus twice daily from 40 days postpartum for three estrous cycles or until conception was verified. In addition, weekly rectal palpations, cowside milk progesterone tests, and tailhead chalk were used to aid in estrous detection. Near infrared spectra of …